#3F438E#3F438E

#3F438E is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.1% C 0.122 H 277.5°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#3F438E
RGB	rgb(63, 67, 142)
HSL	hsl(237, 39%, 40%)
HSV	hsv(237, 56%, 56%)
CMYK	cmyk(55.6%, 52.8%, 0%, 44.3%)
CIE-LAB	lab(31.86, 21.08, -42.31)
CIE-LCH	lch(31.86, 47.27, 296.48°)
OKLab	oklab(42.08% 0.0159 -0.1209)
OKLCH	oklch(42.08% 0.122 277.5)
XYZ	xyz(8.9380, 7.0235, 26.4706)
Luminance	0.0702 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F438E #8E8A3F

analogous

#3F6A8E #3F438E #623F8E

triadic

#3F438E #8E3F43 #438E3F

tetradic

#3F438E #8E3F6A #8E8A3F #3F8E62

square

#3F438E #8E3F6A #8E8A3F #3F8E62

split-complementary

#3F438E #8E623F #6A8E3F

monochromatic

#191B39 #2C2F64 #3F438E #565BB4 #8184C7

Accessibility & contrast

On white

8.73

#3F438E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#3F438E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F438E

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F438E	#FFFFFF	#000000	##FFFFFF
##3F438E	1.00	8.73	2.40	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4E91

Deuteranopia (green-blind)

#0F488C

Tritanopia (blue-blind)

#195462

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3f438e;
/* rgb */ color: rgb(63, 67, 142);
/* oklch */ color: oklch(42.1% 0.122 277.5);

Tailwind

colors: {
  custom: {
    50: '#7b77b0',
    500: '#3f438e',
    950: '#000000',
  },
}

SCSS

$custom: #3f438e;
$custom-light: #7b77b0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f438e",
  "rgb": {
    "r": 63,
    "g": 67,
    "b": 142
  },
  "hsl": {
    "h": 236.962,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.42084,
    "c": 0.1219,
    "h": 277.5
  },
  "luminance": 0.07024
}

Semantic roles & 50–950 ramp

primary

#3F438E

secondary

#B1AE78

accent

#C959CE

background

#F7F7FA

surface

#EEEDF5

border

#C9C8CF

text

#0A0810

muted

#7C7B7F

Preview Lab

Preview with #3F438E

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →